Paul, sounds like you need to take the engine apart
again and recheck the crank and bearings.....and wrist
pins, etc,etc,etc
Donald & Henry Stike
>
> I've got a strange vibration at 2.5-3krpm
> It's definitely engine speed, not road speed
> related.
>
> I can cruise at that rpm range and feel the
> vibration. Take it out of gear, still rolling at
> speed and no vibration. Rev the engine
> while drifting at speed and the vib. is back.
>
> The engine idles smoothly and beautifully
> as low as 600 rpm. It has new lower end bearings,
> flattop pistons, and custom cut 010 over rings.
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